Cardiovascular fitness and physical activity in children with and without impaired glucose tolerance

G. Q. Shaibi, G. D.C. Ball, M. L. Cruz, M. J. Weigensberg, G. J. Salem, M. I. Goran

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Objective: To examine differences in cardiovascular fitness (VO 2max) and physical activity levels in overweight Hispanic children with normal glucose tolerance (NGT) vs impaired glucose tolerance (IGT). Participants: A total of 173 overweight (BMI percentile 97.0±3.1) Hispanic children ages 8-13 years with a family history of type 2 diabetes. Methods: VO2max was measured via a maximal effort treadmill test and open circuit spirometry. Physical activity was determined by questionnaire. Glucose tolerance was established by a 2-h oral glucose challenge (1.75 g of glucose/kg body weight). IGT was defined from an oral glucose tolerance test as a 2-h plasma glucose level ≥140 and <200mg/dl. Results: IGT was detected in 46 of the 173 participants (∼27%); no cases of type 2 diabetes were identified. No significant differences were found between youth with NGT and those with IGT in absolute VO2max (2.2±0.6 vs 2.1±0.5 l/min), VO2max adjusted for gender, age, and body composition (2.2±0.2 vs 2.1±0.2 l/min), or recreational physical activity levels (8.7±8.2 vs 6.9±6.2 h/week). Conclusion: Overweight Hispanic youth with IGT exhibit similar levels of VO2max and physical activity compared to their NGT counterparts. Longitudinal analyses are necessary to determine whether fitness/activity measures contribute significantly to diabetes risk over time in this group.

Original languageEnglish (US)
Pages (from-to)45-49
Number of pages5
JournalInternational Journal of Obesity
Volume30
Issue number1
DOIs
StatePublished - Jan 1 2006
Externally publishedYes

Keywords

  • Insulin resistance
  • Pre-diabetes
  • Youth

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics

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